Thread: Rest API - get empty brackets instead of json when sending GET request

Hello. I really need help. I've been trying to solve this for days now. I am quite a newbie and am going crazy.

I have a maven project. I can succesfully bring out data from my database into the console in my application server. However, when I try to use a restful services and use Postman to get the data out it only returns an empty pair of brackets [] instead of the data in json-format! I've tried various ways to solve it but this I won't get pass this... I have tried to convert it to Json using GSON before I request it but it doesn't work.

RESTful webservice:
 
 
 
    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public Response getJson() {
 
            List<ResultLadok> results = DriverDBLadok_testing.getLadokResultsArrayList();
 
 
        return Response.ok(results)
                .build();
    }
 
 
 
package controller_ladok;
 
 
 
 
public class DriverDBLadok_testing {
    public static List<ResultLadok> resultList = new ArrayList();
    static String jsonString;
 
    public DriverDBLadok_testing() {
    }
 
    public List<ResultLadok> getResultList() {
        return resultList;
    }
 
 
    public void setResultList(List<ResultLadok> resultList) {
        this.resultList = resultList;
    }
 
 
 
    //method to put result in List
    public static void addResult(String betyg, int poang, int provNr, String termin, 
            String datum, String kurskod, String kurstillfalle){
 
        ResultLadok resLadok = new ResultLadok();
 
        resLadok.setBetyg(betyg);
        resLadok.setPoäng(poang);
        resLadok.setProvNr(provNr);
        resLadok.setTermin(termin);
        resLadok.setDate(datum);
        resLadok.setKurskod(kurskod);
        resLadok.setKurstillfälle(kurstillfalle);
 
 
        resultList.add(resLadok);        
    }
 
    //method to get DB data to arrayList
    public static List<ResultLadok> getLadokResultsArrayList(){
 
        try{
            //1. get a connection to database
            Connection myConn = DriverManager.getConnection("jdbc:mysql://localhost:3306/ladoksimulation", "root", "admin");
            //2. create a statement
            Statement myStmt = myConn.createStatement();
            //3. Execute SQL query
            ResultSet myRs = myStmt.executeQuery("select * from resultat");
            //4. process the result set
            while(myRs.next()){
                addResult(myRs.getString("betyg"), myRs.getInt("poäng"), myRs.getInt("provNr"),
                         myRs.getString("termin"), myRs.getString("date"), myRs.getString("kurskod"),
                         myRs.getString("kurstillfalle"));
 
            }        
        }        
        catch(Exception exc){
            exc.printStackTrace();
        }    
 
        return resultList;
    } 
}
 
 
 
Pom file: 
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.mycompany</groupId>
    <artifactId>ladokRestApi</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>ladokRestApi-1.0-SNAPSHOT</name>
 
    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <failOnMissingWebXml>false</failOnMissingWebXml>
        <jakartaee>8.0</jakartaee>
    </properties>
 
    <dependencies>
        <dependency>
            <groupId>${project.groupId}</groupId>
            <artifactId>ladokSimulation</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>${jakartaee}</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
 
     <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>11</source>
                    <target>11</target>
                    <compilerArguments>
                        <endorseddirs>${endorsed.dir}</endorseddirs>
                    </compilerArguments>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.3</version>
                <configuration>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <version>2.6</version>
                <executions>
                    <execution>
                        <phase>validate</phase>
                        <goals>
                            <goal>copy</goal>
                        </goals>
                        <configuration>
                            <outputDirectory>${endorsed.dir}</outputDirectory>
                            <silent>true</silent>
                            <artifactItems>
                                <artifactItem>
                                    <groupId>javax</groupId>
                                    <artifactId>javaee-api</artifactId>
                                    <version>${jakartaee}</version>
                                    <type>jar</type>
                                </artifactItem>
                            </artifactItems>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

Thanks in advance...